C3g
Pentode · IHT · 8-pin Loctal · 1954
“German Post legend. Ultra-linear.”
Small-signal pentode for low-noise voltage amplification
GAIN FACTOR0
PLATE IMPEDANCE0kΩ
TRANSCONDUCTANCE0mA/V
GAIN37%
POWER9%
DRIVE97%
LINEARITY82%
EXECUTIVE SUMMARY
The C3g is a indirectly-heated pentode from Siemens, introduced around 1954. It provides a gain factor (μ) of 37 with 2600Ω plate resistance. Commonly used in preamp / driver applications. German Post legend. Ultra-linear.
APPLICATIONS
Voltage amplifier
Generic pentode preamp / driver stage
• Headphone amp
VS C3m
HISTORY
Introduced1954ManufacturerSiemensEquivalentsC3m
Golden AgeSPECIFICATIONS
Heater Voltage20V
Heater Current0.3A
Max Plate Voltage250V
Max Power3.5W
Sensitivity14 mA/V
Gain Factor37
Internal Impedance2.6kΩ
Pinout8-pin Loctal
Era1954
RaritySought-after
SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.